✅ reference type values are strange..

static void bar(ref int[] baz, int newElem)
{
    int newLength = baz.Length + 1;
    int [] quux = new int [newLength];

    for(int i = 0; i < baz.Length; i++)
        quux[i] = baz[i];

    quux[newLength - 1] = newElem;

    baz = quux;
}
    
static void Main() 
{
    int[] foo = {1, 2, 3, 4};
    foreach(int i in foo)
        Console.Write(i + " ");
    
    Console.WriteLine();
    bar(ref foo, 42);
    
    foreach(int i in foo)
        Console.Write(i + " ");
}